H1B Application Attempts

I graduated in Dec 2014 started my OPT, I have a full time offer from India based MNC and I’m not sure they would sponsor for my H1B visa or not. Some companies are disclosing that they can not sponser at this point of time. I will have 3 chances to apply for H1B from now with my OPT extension.

  1. Is it good choice to try for H1B from April’15 or next year?
  2. Is it advisable to try for H1B from a desi consultancy while I’m being employed at Desi MNC.
  3. Is it necessary for a Desi employer/consultancy to have a client letter and Purchase Order from a client to initiate the H1B processing, some consultancies show in house projects and process H1B. what is the risk involved in this.?